Answer A: Watch gay porn about teacher/student sex or bad tutor scenarios. You can’t lose there.
-or-
Answer B: Realize your masturbation habit is starting to impede your education, and go find a strong-willed keyholder to lock up your cock until school is over for the semester. Those orgasms he allows you will feel amazing because you’ve earned them through hard-work and good grades.

That’s the real difficult choice there, boys.